docs: def as_percent(precision=2, **kwargs):
      """Convert number to percentage string.
  
      Parameters:
      -----------
      :param v: numerical value to be converted
      :param precision: int
          decimal places to round to
      """
      if not isinstance(precision, Integral):
          raise TypeError("Precision must be an integer.")
  
      return _surpress_formatting_errors(
          _format_numer(".{}%".format(precision))
      )